Peter and Jean, two mischievous kids, love to draw monsters. They create Kriss, with three legs, four arms, and ten mouths, who escapes from the sheet of paper and becomes the family's new pet! For Christmas, Jean and Peter go on vacation to the mountains with their parents. Suddenly an avalanche blocks the road, caused by a monster in hot pursuit of Santa Claus! It's up to the kids and their pet monster to save Santa and Christmas!